Which of the following describes how proteins are targeted for translation to the rough ER?
a. It is found at the 3' end of the tRNA
It always ends in CCA
It acts as the attachments site for amino acids
b. The stop codon UGA codes for an amino acid in mitochondria.
Mitochondria use some atypical stop codons such as AGA.
c. a special initiator tRNA charged with N-formylmethionine
the small ribosomal subunit
an mRNA molecule
d. The initial amino acid sequence of these proteins serves as a signal sequence that targets them to the rough ER.